2-Chloro-4-cyanobenzenesulfonyl chloride
2-Chloro-4-cyanobenzenesulfonyl chloride (CAS: 254749-11-6) is an organic building block with the molecular formula C7H3Cl2NO2S and a molecular weight of 236.08 g/mol. This sulfonyl halide is a crucial intermediate in organic synthesis, particularly for the introduction of the 2-chloro-4-cyanobenzenesulfonyl group into target molecules. It finds applications in the development of novel chemical entities and advanced materials, serving as a valuable reagent in research and industrial chemistry.

Organic Synthesis Intermediate
Serves as a key building block for constructing complex organic molecules. Its reactive sulfonyl chloride group readily participates in substitution reactions, enabling the formation of sulfonamides, sulfonates, and other sulfur-containing functionalities.
Pharmaceutical Research
Utilised in the synthesis of potential drug candidates and pharmaceutical intermediates. The specific substitution pattern can be valuable for modulating the biological activity and pharmacokinetic properties of novel therapeutic agents.
Materials Science
Incorporated into the design and synthesis of functional materials. The unique electronic and structural properties conferred by the chloro and cyano substituents can be leveraged in the development of new polymers or specialty chemicals.
| Molecular weight | 236.08 |
|---|---|
| Linear formula | NCC6H3(Cl)SO2Cl |
| Assay | 97% |
| Melting point | 102-106 °C |


Hazard statements
- H314Causes severe skin burns and eye damage
- H317May cause an allergic skin reaction
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 1759 8 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34-43 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 2-Chloro-4-cyanobenzenesulfonyl chloride used for?
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2-Chloro-4-cyanobenzenesulfonyl chloride is primarily used as a building block and intermediate in organic synthesis, particularly for the development of pharmaceutical candidates and functional materials.
What are the CAS number and formula for 2-Chloro-4-cyanobenzenesulfonyl chloride?
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The CAS number is 254749-11-6 and the linear formula is C7H3Cl2NO2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Chloro-4-cyanobenzenesulfonyl chloride with an assay of 97%. This product is intended for research and laboratory use and is not represented as USP, BP, or EP grade.
What are the key safety hazards associated with 2-Chloro-4-cyanobenzenesulfonyl chloride?
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This compound is classified with GHS symbols GHS05 and GHS07, carrying the signal word 'Danger'. It causes severe skin burns and eye damage (H314) and may cause an allergic skin reaction (H317).
How is 2-Chloro-4-cyanobenzenesulfonyl chloride handled and stored?
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Handling requires appropriate personal protective equipment including eyeshields, faceshields, gloves, and respiratory protection (type N100 or P3). Store in a well-ventilated area away from incompatible substances. Refer to the Safety Data Sheet for comprehensive handling and storage guidance.
Does Tech Serve Solutions export 2-Chloro-4-cyanobenzenesulfonyl chloride?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 2-Chloro-4-cyanobenzenesulfonyl chloride.
How can I request a quote or sample for 2-Chloro-4-cyanobenzenesulfonyl chloride?
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To request a quote or sample, please contact the Tech Serve Solutions sales team via our website or direct inquiry channels.
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